/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2016 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
package org.lobobrowser.clientlet;

/**
 * Provides utility methods to access the current clientlet context.
 */
public class ClientletAccess {

    /** The Constant currentClientletContext. */
    private static final ThreadLocal<ClientletContext> currentClientletContext = new ThreadLocal<ClientletContext>();

    /**
     * Instantiates a new clientlet access.
     */
    private ClientletAccess() {
    }

    /** Gets the Constant currentClientletContext.
	 *
	 * @return the Constant currentClientletContext
	 */
    public static ClientletContext getCurrentClientletContext() {
        ClientletContext ctx = currentClientletContext.get();
        if (ctx != null) {
            return ctx;
        } else {
            ThreadGroup td = Thread.currentThread().getThreadGroup();
            if (td instanceof ClientletThreadGroup) {
                return ((ClientletThreadGroup) td).getClientletContext();
            } else {
                return null;
            }
        }
    }

    /** Sets the Constant currentClientletContext.
	 *
	 * @param context
	 *            the new Constant currentClientletContext
	 */
    public static void setCurrentClientletContext(ClientletContext context) {
        currentClientletContext.set(context);
    }
}
